This would be the logic:
e.g.:
Case
when CONTAINS_TEXT(Country drop down,"us") then ((Clicks*0.015*2000)-Cost)
when CONTAINS_TEXT(Country drop down,"uk") then ((Clicks*0.018*1500)-Cost)
ELSE ((Clicks*0.012*1000)-Cost)
END
So far I have been getting an error that dimensions can not be combined with metrics in formulas.
Thanks a million for your help.